Machine for mixing explosives.



No. 882,114. PATENTBD MAR. 1'7, 1908. G. P. JONES.

MACHINE FOR MIXING EXPLOSIVES.

APPLICATION FILED APR. 22. 1907,

5 SHEETS-SHEET 1.

attouwi No. 882,114. PATENTBD MAR, 17, 1908.

, G. P. JONES.

MACHINE FOR MIXING EXPLOSIVE S.

APPLIOATION FILED APR.22,1907.

5 SHEETS-SHEET 2.

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No. 882,114, G P JONES PATENTED MAR. 17, 1908.

MAGHINE FOR MIXING EXPLOSIVES.

APPLICATION FILED APR.Z2,1907.

5 SHEETS-SHEET s.

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Illllllllllllllllllilllll wweufoz NO. 882,114. 'PATENTED MAR. 17, 1908. G. JONES.

MACHINE FOR MIXING EXPLOSIVES.

APPLICATION FILED APR.22.1907.

5 SHEETS-SHBET 4.

UNITED STATES GEORGE P. JONES, F EMPORIUM, PENNSYLVANIA.

MACHINE FDR MIXING EXPLOSIVES.

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Be It known that I, GEORGE P. Jones, a citizen-of" the United States, residing at Em I poriu'm, cfounty ofCarn'eron, and State of ennsylv'ania', have invented certain new and useful Improvements in Machines for Mixing Explosives, of whicli'the following is a'specification.

.This invention relates to machines for mixing explosives.

The mixing of the ingredients of high exl'osivesis avery dangerous 0 eration and is e'quently carried on by han in order that it may be thoroughly carried out wit minimum danger, but as hand-mixing is laborious and the out-put is limited, machines have been used for such purposes and the object of my invention relates to such machines:

The present invention has for its objects the provision of a machine for mixing explosives which will be safe, simple, readily controlled, and adapted for roducing a large out-put in a given period oi time.

Machines for mixing explosives have heretofore embraced, generally speaking, a mixing bowl or tub, stirrers or mixers ada t"- ed to operate therein, and some means For raising the stirrers or mixers from the tub or receptacle-or lowering them into it, and my invention has for its particular object the provision of novel means for raising and oWering the mixing or stirring devicesso that they may be easily positioned within the bowl or receptacle or raised from it, and to "provide a novel construction and arrangement of the mixers and driving means,

all of which are so arranged that particles of the explosive cannot readily have access to the movable parts of the driving and lifting means. Whereas it has been proposed to use com ressed air, or an air-lift, to raise the mixers rom' the bowl or tub'and to lower them by the force of gravity alone, my inventionv contemplates raising the mixers by the-force of gravity; controlled by air pressure, andlowering'them into the bowl or recep't'acle' bya novel compressed air mechanism which is under a; complete and delicate control, permitting the mixers to be raised or l'owered without shook'and as slowly oras as may lie-desired. e invention isset forth fully hereinafter Specification of Letters Patent. Application filed April 22, 1907.

Patented March 17, 1908.

Serial No. 369,602.

and its novel features are recited'in the ap" -pendedclaims.

In the accompanying drawings :Figure* 1 is afro'nt elevation; Fig. 1 a' detail-of the three-way valve ;-Fig. 2', a vertical section; 'Fig. 3, an end elevation; F ig. 4', aciO'ss-- tion on line 44 of Fig. 1', the stirrers being lowered and turned crosswise; Fig. 5, afrdiit elevation of a modification; Fig. 6, a'froritf elevation of another modification; and Fig. 7, a cross-section on line 77 of- Fig. 6, the stirrers being lowered.

The machine has ametal base 1 which;

may be supported on asuitable' foundation, from whic rise illars 2 having cylinders 3 therein, to the ower ends of which lead branches 4 of a ipe 5 which may be supplied with compressed air or Water pressure, compressed air being usually employed. The branches 4 are each provided with regulating valves 6 and the pipe 5 has a three-Way controlling valve 7, (Big. 1) having a supply pipe 5' and exhaust pipe 5 Supported upon t mixing bowl, tub, or receptacle 8, which contains radiator pipes 9, throu h which hot water or steam is passed to e'ep the contents of the bowl or receptacle 8 at the proper tem r'ature'.

T e pillars 2 are connected by a cross-head 10, WhlCh is braced from the base 1 by a brace 1 1. Extending in alinement with each other and secured to the pillars 2, are arms 12, which have bushings or bearings 13. J ournaled in the bushings or bearings 13 are tubular shafts 14 of fork-like stirrers 15, while extending through the tubular shafts 14 are stirrer shafts 16, which are provided at their lower ends with stirrers 17 of forklike form, the tines of the stirrers 17 extend ing upwardly to ass through the spaces between the tines o the stirrers 15. The pairs of stirrers lie side by side and are adapted to rotateso that the extremities of one pair do not quite touch the extremities of the otherpair, which is more clearly seen from an inspection of Fig. 4. The numerals 18 desig- -nate 'belt-pulle s, which are loosely splined at 18 on the s afts16 above boxes 19 supported b the crossiece 10 so that the shaft 16 can sip u and own through these pul leys and stil be driven by them. Loosely splined at 20 on the tubular shafts '14 are e base 1 is the double down slipping of the tubu scans belt-pulleys 20, which are supported by the I cylinder are used; v With this machine the bUShIII SOI boxes 13 and ermit free up and in shafts ,14 while rotating the latter. Journaled in brackets 21 on brace 11 is a driving shaft 22 which maybe driven by any suitable gearing 23 from a ower shaft 24. The shaft 22 has securedrt ereto belt-pulleys 25 and 26. A belt 27 passes around pulleys 25 and 18. A belt 28 passes around pulleys 26 and 20. Slidable vertically Within the cylinders 3 are pistons 29 which are provided with heads. 30-

. that fit the interior .of the cylinders, and they i may be packed in any preferred manner.

'Thepistons 29 are of such weight that they.

more than counterbalance, that is, over- -b al- Since, the respective stirring means consisting of shafts 14 and 16 and stirrers 15 and 17, these pistons being connected to the respective shafts 16 by cables 31 which pass around sheaves '32 and are swiveled at 33 to the upper ends of the shafts 16 and, in consequence,

the tendency of these'pistons is to raise the stirrers. Hence, when the pressure, whether compressed air, water, or other motivefluid, is withdrawn from the cylinders 3, the. pistons 29 will sink in the cylinders and raise the stirrers from the bowl or rece tacle 8, according to the extent to whic such fluid pressure is relieved or withdrawn from these cylinders. When pressure is admitted into the cylinders 3 below the piston heads 30, the pistons are raised and the stirrers then descend into the bowl 8. The valves 6 and 7 afford the means whereby the pressure may be controlled to either'simultaneously raise or lower the stirrers orto raise or lower one s set independently-"of the other set, and the operator is thus enabled to raise or lower either or both stirrersto any desired extent,

' without shock or 'ar and as fast or as slow as desired. The ex aust pipe 5 permits the pressure in the cylinders 3 to be let ofi.

- In order that the stirrers may not descend so far within the bowl 8 that they will touch the bottom thereof (which would be exceed ingly dangerous) suitable means may be proone of a number of. desired positions by bolts 35 which cooperate with toothed slotted plates 36. To insure thatv the mixersmay remain in the bowl without the-necessity for maintaining the motive fluid pressure a ainst the piston heads 30, there are provided andscrews 37, -which may be screwed in 'far' enough to hold the piston heads 30 between them and the abutments 34.

. .In 'Fig. 5 I have illustrated a modificationv of the invention wherein a single piston and sets of mixers must necessarily both rise and 'fall together; The piston is here shown at 29 and the cable, which is shown at 31*, passes over two sheaves 32 and thence is provided with two strands 40 which are se cured by bolts 41 to across-head 42, through which the shafts 16 loosely pass, .the heads 16 at the upper ends of shafts 16 holding the shafts in engagement with thecross-head 42,

but permitting free turnin of said shafts.

In Figs. 6 and 7 I have ustrated another modification of the invention, wherein the raising and lowering mechanism is the same as that shown in Fig. 5. Sprocket wheels 18*, and as rocket chain 27 are shown as substitutes or thebelt-pulleys l8 and belt 27. This machineis driven by a sprocket wheel on the shaft 22. In this modification of the machine, the stirrers are shown at 50,

other modifications of the machines may be resorted to. To prevent shock or jar when the stirrers are lowered, suitablerubber faced collars 75 are employed. s

Having thus described my invention, what ters Patent, is

1. In a machine for mixing explosives, the combination with a mixing receptacle, of a mixer adapted to be-lowered into or raised from the mixing receptacle, means for overbalancing said mixer tending toraise it, and means for causin the lowering of the mixer into the receptac e against the action of said overbalancing means.

2. In a machinefor mixing explosives, the combination with a mixing receptacle of a mixer, motive fluid operated means for causing the lowering of the mixer into the mixing receptacle, and means for automatically raissure.

3. In a machine for mixing explosives, the

'115 ing the mixer on the release of the fluid prescombination with a receptacle,of a

mixer, motive fluid operated means for cansing the lowering of the mixer into the mixing receptacle, and overbalancing means for automatlcallv raising the mixer on the release of the motive fluid pressure.

4. In a machine for mixing explosives, the

combination with a mixing receptacle and a 'mixer, of a cylinderfan overbalancing piston playingin the cylinder, 9. wheel, and a flexi- 100 I claim as new and desire to secure by Lethie connection between the overbnleneing piston and the mixer which passes over the wheel whereby the-piston tends to raise the mixer. l v

5.7 111 a machine for llllXlIlg exploslves, the

flexl 1e connection between said piston and the mixer which passes over. the wheel, and 10 -fluid operated means for l aising. said iston.

"In testimony whereof, I hereunto a x my signature in presence-of two witnesses.

GEORGE, P. JONE VVitnesses:

JAY l FELT, GEO. METzGEmJr. 

